Quantum Networks

Quantum communication is one of the main applications of an emerging quantum technology. Quantum networks, once operational, promise secure communication or can be used for distributed quantum computation or distributed sensing. There are two main approaches to fight the influence of loss, noise, and decoherence in quantum communication: encoded transmission and entanglement-based quantum repeaters [1].

We are interested in comparing or combining these approaches to obtain protocols with high error thresholds and rates, e.g. by using measurement-based elements [2]. We work on the extension of point-to-point communication protocols to true multi-user networks, where multiparty entangled states are distributed using an intrinsically multiparty approach.